1268259899 has 8 divisors (see below), whose sum is σ = 1335344640. Its totient is φ = 1201208616.

The previous prime is 1268259887. The next prime is 1268259911. The reversal of 1268259899 is 9989528621.

It is an interprime number because it is at equal distance from previous prime (1268259887) and next prime (1268259911).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268259899 is a prime.

It is a super-2 number, since 2×1268259899² = 3216966342822980402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268259829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120482 + ... + 130584.

It is an arithmetic number, because the mean of its divisors is an integer number (166918080).

Almost surely, 2^1268259899 is an apocalyptic number.

1268259899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1268259899 is a deficient number, since it is larger than the sum of its proper divisors (67084741).

1268259899 is a wasteful number, since it uses less digits than its factorization.

1268259899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16729.

The product of its digits is 5598720, while the sum is 59.

The square root of 1268259899 is about 35612.6367880841. The cubic root of 1268259899 is about 1082.4373106298.

The spelling of 1268259899 in words is "one billion, two hundred sixty-eight million, two hundred fifty-nine thousand, eight hundred ninety-nine".